rs6000: Add command line and builtin compatibility check

2020-03-20  Carl Love  <cel@us.ibm.com>

	PR/target 87583
	* gcc/config/rs6000/rs6000.c (rs6000_option_override_internal):
	Add check for TARGET_FPRND for Power 7 or newer.

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7f00a13..2bb7ccc 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-20  Carl Love  <cel@us.ibm.com>
+
+       PR/target 87583
+       * gcc/config/rs6000/rs6000.c (rs6000_option_override_internal):
+       Add check for TARGET_FPRND for Power 7 or newer.
+
 2020-03-20  Jan Hubicka  <hubicka@ucw.cz>
 
        PR ipa/93347

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 4ecf972..07f7cf5 100644 (file)
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -3714,6 +3714,14 @@ rs6000_option_override_internal (bool global_init_p)
       rs6000_isa_flags &= ~OPTION_MASK_CRYPTO;
     }
 
+  if (!TARGET_FPRND && TARGET_VSX)
+    {
+      if (rs6000_isa_flags_explicit & OPTION_MASK_FPRND)
+       /* TARGET_VSX = 1 implies Power 7 and newer */
+       error ("%qs requires %qs", "-mvsx", "-mfprnd");
+      rs6000_isa_flags &= ~OPTION_MASK_FPRND;
+    }
+
   if (TARGET_DIRECT_MOVE && !TARGET_VSX)
     {
       if (rs6000_isa_flags_explicit & OPTION_MASK_DIRECT_MOVE)